docs: def labels_in_range(self, start, end, fully_included=False):
          """
          Return a list of labels, that are within the given range.
          Also labels that only overlap are included.
  
          Args:
              start(float): Start-time in seconds.
              end(float): End-time in seconds.
              fully_included(bool): If ``True``, only labels fully included
                                     in the range are returned. Otherwise
                                     also overlapping ones are returned.
                                     (default ``False``)
  
          Returns:
              list: List of labels in the range.
  
          Example:
              >>> ll = LabelList(labels=[
              >>>     Label('a', 3.2, 4.5),
              >>>     Label('b', 5.1, 8.9),
              >>>     Label('c', 7.2, 10.5),
              >>>     Label('d', 10.5, 14)
              >>>])
              >>> ll.labels_in_range(6.2, 10.1)
              [Label('b', 5.1, 8.9), Label('c', 7.2, 10.5)]
          """
  
          if fully_included:
              intervals = self.label_tree.envelop(start, end)
          else:
              intervals = self.label_tree.overlap(start, end)
  
          return [iv.data for iv in intervals]